Thursday

November 27, 2014

November 27, 2014

Posted by **J** on Monday, February 4, 2008 at 5:59pm.

Once again, I am lost!!!

- Physics -
**Damon**, Monday, February 4, 2008 at 6:38pma) C = q/V so q = C V

= 5*10^-6 * 1.5

= 7.5 * 10^-6 Coulombs

now do E = (1/2) C (1.5)^2 to get energy

E = .5 (5*10^-6)(2.25)

E = 5.63*10^-6 Joules

b) Luckily we derived this in your last question, but now that I see your questions you probably have it in your book and have not had calculus so

E = (1/2) C V^2 from your book or the other problem

E = (1/2) C (q/C)^2

(q/C)^2 = 2 E/C

q^2/C^2 = 2 E/C

q^2 = 2 E C

q = sqrt (2E*C)

q = sqrt (2 * 5 * 10*-6)

q = 10^-3 sqrt (10)

q = 3.16 * 10^-3 coulombs

c)V = q/C = 2.24*10^-3 / 5*10^-6

V = .447* 10^3 = 447 volts, watch out

**Answer this Question**

**Related Questions**

physics - A parallel capicitor is made of two plates with cross sectional area A...

Physics - Two circular metal disc each of 3.00 cm diamter are 1.5 mm apart make ...

physics - You have a parallel plate capacitor (with air between its plates) ...

Physics - Three parallel plate capacitors (C1,C2 and C3 ) are in series with a ...

Physics- Circuits - A 100-microCoulomb parallel-plate capacitor is charged with ...

Physics - Review Conceptual Example 11 before attempting this problem. An empty ...

Physics - Consider an RC series CKT with V in series with RC. V=7 V, R=15 Ohm, C...

physics - A parallel-plate capacitor has plates with an area of 450 cm^2 and an ...

PHYSICS - A parallel-plate capacitor has plates with an area of 450 cm^2 and an ...

Physics - A parallel-plate capacitor has a capacitance of 2.1 µF with air ...